Make lower number the same,
so 2/5 = 16/40 by multiplying by 8/8
and 1/8 = 5/40 by multiplying by 5/5
then 16/40 + 5/40 = 21/40
two thirteenths 325/1000
One fifth plus one fifth is two fifths (2/5).
One fifth PLUS two fifths = 3 fifths
To add two-fifths and one-eighth, first find a common denominator, which is 40. Converting the fractions, two-fifths becomes 16/40 and one-eighth becomes 5/40. Adding these together gives 21/40. Therefore, two-fifths plus one-eighth equals 21/40.
Three and three eights
If you are asking one-eighth plus two-thirds then the answer is 14/16 which reduces to 7/8. Find the least common denominator (16) If you are asking one over one-eith plus two-thirds then the answer is 8 and two-thirds. This is because one over one-eighth means one divided by one eighth. You would invert the denominator (one-eighth) and multiply it to one. Eight over one is the same as eight. One times eight equals eight. Then add eight to two-thirds. This equals eight and two thirds (8 2/3).
2.5625
4.8
3 and 13/24
3 and 13/20
The answer is 17/35.
nine twentieths